WO2005020591A1

WO2005020591A1 - 3-dimensional video reproduction device and 3-dimensional video reproduction method

Info

Publication number: WO2005020591A1
Application number: PCT/JP2004/010203
Authority: WO
Inventors: Ryuji Kitaura; Kazuto Ohhara; Toshio Nomura; Naoki Ishihara
Original assignee: Sharp Kabushiki Kaisha
Priority date: 2003-08-26
Filing date: 2004-07-16
Publication date: 2005-03-03
Also published as: KR20060087511A; US8035683B2; CN1864415A; KR100820129B1; US20060290778A1; JP2005073049A; CN1864415B; EP1662809A4; EP1662809A1

Abstract

When displaying a 3-dimensional video in various display devices, it is possible to display the video in such a manner that it can be viewed 3-dimensionally even when the size of the display device is large or the display device has a lowered resolution. A 3-dimensional video reproduction device includes: judgment means for judging whether a parallax mount on a display screen when the 3-dimensional video data is displayed is greater than a parallax amount in a display device appropriate for display of the 3-dimensional video data according to reference information contained in control information; and image processing means for performing image processing for modifying the parallax amount. The parallax amount of the 3-dimensional video is adjusted according to the ratio between the inter-dot pitch of the display device serving as a reference when displaying the 3-dimensional video and the inter-dot pitch of the local device.

Description

Specification

Stereoscopic video reproducing apparatus and stereoscopic video reproducing method

Technical field

The present invention relates to a stereoscopic video reproducing apparatus and a stereoscopic video reproducing method for reproducing a three-dimensional video so that it can be viewed stereoscopically.

Background art

Conventionally, various methods for displaying a three-dimensional image have been proposed. Among them, the one that is generally used is the one that uses binocular parallax and is called the binocular system. That is, stereoscopic vision can be performed by preparing a left-eye image and a right-eye image having binocular parallax and projecting them independently to the left and right eyes. Such three-dimensional images have different stereoscopic effects depending on the magnitude of binocular parallax (hereinafter, referred to as the amount of parallax). Therefore, even if the three-dimensional image is the same, if the display size displayed on the screen is different, the amount of parallax changes and the appearance is different. That is, even when the same display device is used, the amount of parallax increases when the display size of the video is enlarged. In addition, different display devices may increase the amount of parallax when displayed on a display device having a large size.

[0003] Fig. 7 illustrates this, where w is W in the figure. As shown in FIG. 7 (a), when the stereoscopic image of the right-eye image 701 and the left-eye image 702 is fused at the position 703, as shown in FIG. As the size increases, the amount of parallax, which was w in the state shown in FIG. If W becomes too large, stereoscopic vision with both eyes becomes impossible. If the image is enlarged by image processing, it is enlarged by the processing on the terminal side, so it is possible to foresee in advance the possibility that stereoscopic viewing may not be possible. There was a problem that could not be grasped.

[0004] In order to solve such a problem, in Patent Document 1, information on the size of a display device that can provide a suitable stereoscopic effect even when a 3D image is supplied as it is is received together with the 3D image data, There is disclosed a technique for changing the amount of parallax of a three-dimensional video so that a good stereoscopic effect can be obtained even in a display device of a user terminal.

Patent Document 1: JP-A-10-150608 Disclosure of the invention

Problems to be solved by the invention

[0005] However, the conventional technique has a problem that only the case where the size is different between different display devices is considered, and the case where the resolution is different is not considered.

FIG. 8 is a diagram showing examples of display devices having different sizes and resolutions. The display device shown in FIG. 8 (a) and the display device shown in FIG. 8 (b) have different sizes, but have the same resolution, and the display devices shown in FIG. 8 (b) and FIG. Same, but different resolutions. Note that the dotted lines in the figure represent dot breaks. 8 (a) and 8 (b) show the image displayed on the full screen, and FIG. 8 (c) shows the image displayed at the center.

[0007] Comparing the display device shown in FIG. 8 (a) with the display device shown in FIG. 8 (b), the size of the display device becomes large, and when the resolution does not change, the dot interval of the display device becomes large. To be wider, the displayed image is spatially stretched. However, when the resolution increases according to the size as in the display device shown in FIG. 8A and the display device shown in FIG. 8C, the display size of the video does not always increase. .

[0008] Even when the size of the display device does not change, if the resolution is reduced, the video is enlarged and displayed, so that the amount of parallax increases. As described above, it is not enough to consider only the size of the display device.

[0009] The present invention has been made to solve the above problems, and an object of the present invention is to display a three-dimensional image in a stereoscopic manner according to the size and resolution of a display device. It is an object of the present invention to provide a stereoscopic video reproducing apparatus and a stereoscopic video reproducing method which can be performed.

Means for solving the problem

[0010] A stereoscopic video reproducing apparatus according to the present invention is a stereoscopic video reproducing apparatus that reproduces a three-dimensional video based on control information for controlling display of the three-dimensional video data. It is determined based on the control information whether or not the amount of parallax on the display screen when is displayed becomes larger than the amount of parallax on the display screen when the 3D video data is displayed on the reference display device. And image processing means for performing image processing for changing the amount of parallax, and performing image processing by the image processing means when the amount of parallax is determined to be large by the determining means. Features. [0011] More preferably, the image processing means is a parallax amount adjusting means for adjusting a parallax amount by moving an image of a predetermined viewpoint forming the three-dimensional image data in a horizontal direction. I do.

[0012] More preferably, the image processing means includes a size changing means for changing the size of the video.

[0013] More preferably, the control information includes information relating to the resolution of the reference display device.

[0014] More preferably, the control information includes information about a display size when the three-dimensional video data is displayed on the reference display device.

[0015] A stereoscopic video reproduction device according to the present invention is a stereoscopic video reproduction device that reproduces a three-dimensional video based on control information for controlling display of three-dimensional video data. Determining means for determining whether or not the amount of parallax on the display screen when displaying the three-dimensional video data is a stereoscopically visible value; and size changing means for changing the image size of the three-dimensional video data Wherein the enlargement and reduction ratios are limited when the determination unit determines that the value is not a stereoscopically visible value.

[0016] More preferably, the control information includes a parallax amount of an important subject and parallax information indicating a parallax amount of the three-dimensional video data.

[0017] A stereoscopic video reproduction method according to the present invention is a stereoscopic video reproduction method for reproducing a three-dimensional video based on control information for controlling display of the three-dimensional video data. It is determined based on the control information whether or not the amount of parallax on the display screen when is displayed becomes larger than the amount of parallax on the display screen when the 3D video data is displayed on the reference display device. And an image processing step of performing image processing for changing the amount of parallax, and performing image processing by the image processing step when the amount of parallax is determined to be large in the determining step. And

[0018] More preferably, the image processing step adjusts the amount of parallax by moving an image of a predetermined viewpoint constituting the 3D image data in a horizontal direction.

[0019] More preferably, in the image processing step, an image size of the three-dimensional video data is changed. [0020] More preferably, the control information includes information on a resolution of the display device serving as the reference.

More preferably, the control information includes a display size when the three-dimensional video data is displayed on the reference display device.

[0022] A stereoscopic video reproduction method for reproducing a three-dimensional video based on control information for controlling display of the three-dimensional video data, wherein the three-dimensional video data is displayed according to the control information. In this case, the image size of the three-dimensional video data is changed by limiting the enlargement and reduction ratios so that the amount of parallax on the display screen attains a value that enables stereoscopic viewing.

[0023] A stereoscopic video reproducing method according to the present invention is a stereoscopic video reproducing method for reproducing a three-dimensional video based on control information for controlling display of three-dimensional video data. Determining whether the amount of parallax on the display screen when displaying the three-dimensional video data is a stereoscopically visible value, and changing the image size of the three-dimensional video data Wherein the enlargement and reduction ratios are limited when it is determined in the determination step that the value is not a stereoscopically visible value.

[0024] More preferably, the control information includes a parallax amount of an important subject and parallax information indicating a parallax amount of the three-dimensional video data.

The invention's effect

According to the present invention, when one piece of three-dimensional video data is displayed on different display devices, the amount of parallax on the display screen when the three-dimensional video data is displayed is reduced by the amount of parallax of the three-dimensional video data. By adjusting the amount of parallax of the three-dimensional video when the amount of parallax is larger than that of a display device that is optimal for display, it is possible to solve the problem that the three-dimensional video is displayed in a state where stereoscopic viewing is not possible. The advantageous effect that it can be obtained is obtained.

Further, according to the present invention, the parallax amount is limited by restricting the enlargement / reduction ratio of the image according to the parallax amount displayed on the screen of the display device or the actual display size of the video. This has the advantage of solving the problem of displaying 3D video data in a state where stereoscopic viewing is not possible due to the size exceeding the limit.

Brief Description of Drawings FIG. 1 is a block diagram showing a configuration example of a stereoscopic video playback device according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration example of an image processing unit of the stereoscopic video playback device according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating a parallax barrier display device.

FIG. 4 is a diagram showing a processing flow of the stereoscopic video playback device according to the first embodiment of the present invention.

FIG. 5 is a diagram for explaining parallax amount adjustment processing.

FIG. 6 is a diagram showing a processing flow of a stereoscopic video playback device according to a second embodiment of the present invention.

FIG. 7 is a diagram illustrating a change in the amount of parallax due to enlargement.

FIG. 8 is a diagram showing an example of display depending on the display device.

Explanation of symbols

[0028] 10 Stereoscopic video playback device

11 Separation means

12 Decryption means

13 Control means (judgment means)

14 Image processing means

15 Display means

141 Sizing means

142 pieces; ^ Sato ^ Single 1¾

143 Display video generation means

301 Video display panel

302 Parallax Barrier

303 Left Eye

304 right eye

501 display position

502 display position 503 position

504 display position

505 position

701 Right Eye Video

702 Left eye video

703 position

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a configuration example of a stereoscopic video playback device according to the first embodiment of the present invention. In FIG. 1, a stereoscopic video reproducing apparatus 10 includes a separating unit 11, a decoding unit 12, a control unit 13 (determining unit), an image processing unit 14, and a display unit 15. Although not shown, the separating unit 11 is connected to a unit that reads data from a recording medium and a unit that receives data via a communication path.

[0031] The separating unit 11 separates multiplexed data obtained by multiplexing a plurality of types of data such as video data, audio data, control information, and the like according to a predetermined method into data of respective components. As a multiplexing method, a transport stream defined by the MPEG-2 system standard is known. Note that the video data and the control information may be separately input without using the separation unit 11.

[0032] The control information includes information indicating that the video data is a three-dimensional video, and reference information. The reference information is information serving as a reference for determining a change in the amount of parallax.Here, when a 3D image is displayed as it is, information on a resolution of a reference display capable of obtaining a suitable stereoscopic effect ( Display size and resolution, which are referred to below as the reference display size and reference resolution).

[0033] The decoding means 12 decodes video data encoded by a predetermined method. Generally, when transmitting or recording video data, it is encoded to compress the data amount. MPEG-2 video, MPEG-4 video, Mo JPEG is known as an encoding method for still images.

[0034] The control means 13 controls each means so that video data is appropriately reproduced based on control information and the like. The display size and resolution of the display means 15 are input to the control means 13. The change of the size of the three-dimensional video data, the adjustment of the amount of parallax, and the like in the case where the display means 15 having a different display size or resolution is changed will be described later in detail. The display size and resolution are set by a predetermined force when the display means 15 is fixed to the stereoscopic video playback device, and set by a user when connected to an external display device. There is.

[0035] The image processing means 14 performs image processing in units of frames constituting video data. FIG. 2 shows a configuration example of the image processing means 14. As shown in FIG. 2, the image processing means 14 includes a size changing means 141 for performing enlargement processing or reduction processing of the video data, a parallax amount adjusting means 142 for adjusting the parallax amount of the three-dimensional video, and a video display means. It comprises display video generation means 143 for converting into 15 display formats.

[0036] The display means 15 is a display device capable of displaying a three-dimensional image, and display devices such as a field sequential system and a parallax barrier system are known. In the present embodiment, the power to describe a case where a display device of a parallax barrier method is used The present invention is not limited to this, and can be applied to display devices of other methods.

The parallax barrier method will be described with reference to FIG. FIG. 3A is a diagram illustrating the principle of generating parallax by the parallax barrier method. The parallax barrier 302 is placed on the front of the video display panel 301. Fig. 3 (b) is a diagram showing a display format of a screen displayed by the parallax barrier method, in which left-eye images and right-eye images are arranged alternately every other pixel in the horizontal direction. .

[0038] In the parallax barrier method, an image as shown in Fig. 3 (b) is displayed on the image display panel 301, and is passed through a parallax barrier 302 having slits at intervals smaller than the interval between pixels at the same viewpoint. The left-eye image can be observed only with the left eye 303 and the right-eye image can be observed only with the right eye 304, so that stereoscopic vision can be performed.

Although not shown in FIG. 1, when audio data is included in the multiplexed data, After being separated by the separation means 11 and subjected to the decoding process, they are output from the speaker.

The operation of the stereoscopic video playback device 10 configured as described above will be described with reference to FIG. FIG. 4 is a diagram showing a flow of processing from the time when the multiplexed data is supplied to the stereoscopic video reproduction device 10 until the video is displayed.

[0041] Demultiplexing means 11 receives multiplexed data in which video data, audio data, and control information are multiplexed. Separating means 11 separates the input multiplexed data (step ST dish).

[0042] When the video data separated by the separation unit 11 is encoded by a predetermined encoding method, the decoding unit 12 interprets the format of the data defined by the encoding method, and decodes the image data. The data is decrypted (step ST102). In general, encoded video data is encoded with information on the size of the video data (image size information indicating the number of pixels in one video frame). Image size information of the decoded video data is output to the control means 13. Note that the image size information of the video data may not necessarily be obtained from the decoding unit 12 but may be separately input to the control unit 13 by another unit. If the video data has not been encoded, step ST102 is omitted.

The control means 13 interprets the control information input from the separation means 11, and calculates a reference dot pitch DPI from the reference display size and the reference resolution. Further, a dot pitch DP2 of the display means 15 is calculated from the display size and resolution of the display means 15 (step ST103).

The pitch between dots is, for example, that the size of the display means 15 is 12.1 inches and the resolution is 1024

In the case of X768 dots, it is calculated as about 0.24mm. When calculating the pitch between dots, only the horizontal direction is concerned with the binocular disparity, so only the horizontal dot pitch may be considered.

Next, the process branches depending on the presence or absence of the size change process (step ST104). When performing the size change process, the process proceeds to step ST105. If not, the process proceeds to Step ST107. Here, the size change processing is an enlargement processing or a reduction processing of an image. For example, it is assumed that the display device shown in FIG. 8A is a reference display and the display device shown in FIG. In this case, the display hand The display size of step 15 is larger than the reference display size, and the resolution is also higher than the reference resolution.The image displayed on the entire screen on the reference display is displayed on the display unit 15 at a predetermined portion of the screen. Is displayed. In such a case, enlargement processing is performed to display the video data on the entire screen. Also, in the case where the resolution of the display means 15 is lower than the resolution of the reference display, in the case where the video data capacity display section 15 which was able to display the entire screen on the reference display cannot fit on the display screen, . In such a case, a reduction process is performed to display the video data on the entire screen. The presence or absence of the size change process is set by a preset force \ user as an internal flag. The presence or absence of the size change processing is input to the image processing means 14 as a control signal A.

[0046] In step ST105, the following processing is performed. First, the control means 13 calculates an enlargement / reduction ratio from the image size information of the video data and the resolution of the display means 15. Here, in the horizontal direction, the value obtained by calculating the ratio of the resolution of the video data before and after performing the size change processing is defined as the enlargement / reduction ratio. The enlargement / reduction ratio is input to the image processing means 14, and the size changing processing is performed by the size changing means 141 of the image processing means 14. In step ST106, the control means 13 corrects the inter-dot pitch DP2 by multiplying the inter-dot pitch DP2 of the display means 15 by the enlargement / reduction ratio. This is because the result of enlarging and displaying an image is considered to be equivalent to the case where the pitch between dots is increased.

[0047] The control unit 13 compares the standard dot pitch DPI and the dot pitch DP2 of the display unit 15 with each other, and displays it on the display unit 15 rather than the parallax amount when the three-dimensional image is displayed on the reference display. It is determined whether or not the parallax amount at the time becomes large (step ST107). If DP2 is equal to or less than DP1, the parallax amount remains unchanged or becomes small, so that no correction is required, and the process proceeds to step ST109. If DP2 is larger than DPI, the amount of parallax increases, so it is determined that the amount of parallax needs to be adjusted, and the process proceeds to step ST108. The presence or absence of the parallax adjustment processing is input to the image processing means 14 as the control signal B, and the parallax adjustment processing is performed by the parallax adjustment means 142 (step ST108). In step ST109, the control means 13 outputs the type (two-dimensional / three-dimensional) of the video data to the image processing means 14 and the display means 15 as a control signal C.

When the video data is a three-dimensional video, the display image generating means 1 of the image processing means 14 By 43, the display format is converted into a three-dimensional video display format on the display means 15 and displayed on the display means 15.

Here, the parallax amount adjustment processing will be described with reference to FIG. Fig. 5 shows the composition of a 3D image displayed on the display viewed from above. In FIG. 5A, the pixel R1 of the right-eye image is displayed at the display position 501, and the corresponding pixel L1 of the left-eye image is displayed at the display position 502. Since these pixels form an image at position 503, they are observed with a depth greater than the display surface.

FIG. 5B shows a state in which the display position of the pixel R1 of the right-eye image is moved to the left and changed from the position 501 to the position 504. Here, the image forming the image at the position 503 becomes visible at the position 505. Since the position 505 is located closer to the display than the position 503, the user can see the position closer to the display surface. Although not shown, if the pixel R1 is moved to the right of 501 on the contrary, an image is formed at the position 503, and the image becomes visible behind the display surface.

As shown in FIG. 7 (b), when the amount of parallax becomes too large, the image for the right eye is moved to the left, or the image for the left eye is moved to the right, and the amount of the parallax is increased. To adjust. The amount of parallax is a horizontal relative distance between corresponding portions of the left-eye image and the right-eye image.For example, the display position of the pixel R1 of the right-eye image in FIG. The relative distance of the display position of the pixel L1 of a certain left-eye image corresponds to that. In this case, in order to adjust the amount of parallax to be small, the display position of R1 and the display position of pixel L1 of the left eye image may be moved in a direction in which the relative distance between them is reduced. The parallax adjustment value designates the amount of movement from the position 501 to the position 504, and uses a predetermined value according to the ratio between the dot pitches DP1 and DP2. Further, the left and right images may be moved in opposite directions by half of the parallax amount adjustment value.

Here, the above processing will be supplemented by a specific example. Here, consider a case in which a three-dimensional image having a reference display size of 10 inches and a reference resolution of {40 to 480 dots} is reproduced by a stereoscopic image reproduction device having a display of 12.1 inches and 1024 × 768 dots. Calculating the standard dot-to-dot pitch DPI and the dot-to-dot pitch DP2 in the display device of the stereoscopic video playback device, DPI is 0.32 mm and DP2 = 0.24 mm. When the resizing process is not performed, DPI> DP2, so the image is displayed without adjusting the parallax amount. [0052] In the case of performing the size changing process, if the enlargement process is performed to display a full screen, the video data needs to be 1.6 times in both the horizontal and vertical directions. If the dot pitch DP2 is corrected, DP2 = 0.38. In this case, since DPI <DP2, the amount of parallax is adjusted.

[0053] As described above, by adaptively adjusting the amount of parallax according to the resolution of the display unit 15, the amount of parallax becomes larger than the limit, and the 3D image data is displayed in a state where stereoscopic viewing cannot be performed. Doing so can solve the problem.

In the above embodiment, when performing the parallax amount adjustment processing, a predetermined value is used as the parallax amount adjustment value. However, the maximum parallax amount of the three-dimensional video or the most important The power including the parallax information such as the parallax amount of the subject in the control information may be received, and the parallax information may be changed according to the ratio of the dot pitches DP1 and DP2.

Further, in the above embodiment, the case where the display size and the resolution are included in the control information as the information on the resolution of the reference display used as the reference information has been described. The same effect can be obtained in a case where the control information includes the following dot pitch or the number of dots per unit area. Alternatively, the display size on the reference display may be included in the control information instead of the information on the resolution. In this case, the pitch may be changed to the pitch between dots by dividing by the image size information of the video data.

Further, in the above embodiment, the size change process may be performed by using a value obtained by dividing the force dot pitch DP2, which is performing the parallax adjustment process in step ST108, by the DPI as a reduction ratio. Since the amount of parallax is reduced by reducing the video data, the same effect as the above-described parallax amount adjustment processing can be obtained.

Further, in the above embodiment, the enlargement / reduction ratio is obtained by calculation, but the enlargement / reduction ratio may be specified by the user. In this case, the amount of parallax is corrected according to the specified enlargement / reduction ratio. Not limited to this case, a means for notifying the user of the presence / absence of the size change processing and the presence / absence of the parallax amount adjustment processing in the control unit 13 is separately provided, so that the video data is enlarged or reduced by the user. A message indicating that the amount is being adjusted may be displayed, and the reference display size and the reference resolution may be displayed together. By doing so, the user can determine whether or not the size For example, when multiple resolutions can be selected as in a personal computer that is widely used, video data can be displayed with a desired amount of parallax by switching resolutions. Therefore, convenience can be improved.

Second embodiment>

Further, another embodiment of the present invention will be described. The stereoscopic video playback device according to the present embodiment receives the parallax information such as the maximum parallax amount of the three-dimensional video and the parallax amount of the most important subject in the control information, and receives the parallax information of the three-dimensional video displayed on the display unit 15. Adjust the volume. Here, the parallax information may be an absolute amount such as a dot unit or a millimeter unit.

FIG. 6 is a diagram showing a flow of processing at this time. In FIG. 6, the processing of step ST201 and step ST202 are the same as those of step ST101 and step ST102 in the above-described embodiment, respectively, and thus description thereof will be omitted.

The control unit 13 calculates an enlargement / reduction ratio from the sizes of the video data before and after performing the size change processing (step ST203), and calculates the actual amount of disparity by multiplying the disparity information (step ST203). Step ST204). At this time, if the input parallax information is in units of dots, the inter-dot pitch DP on the display means 15 is calculated, and the parallax information is multiplied by the inter-dot pitch DP.

[0061] Next, the parallax amount in step ST204 is compared with a predetermined limit value, and if the parallax amount exceeds the limit value, the process proceeds to step ST206; otherwise, the process proceeds to step ST207. (Step ST205). Here, the limit value is determined so that the three-dimensional image falls within a range that can be fused as a stereoscopic image. It is known that if the amount of parallax is greater than the distance between human eyes, stereoscopic vision becomes difficult. For example, the limit value may be about 6.5 cm, which is the approximate distance between both eyes.

[0062] In step ST206, the enlargement / reduction ratio is limited so that the actual amount of parallax does not exceed the limit value. The calculated enlarged Z reduction ratio is output to the image processing means 14.

[0063] The image processing means 14 performs a size change process using the limited enlargement Z reduction ratio (step ST207), and converts the image into a display format that can be displayed on the display means 15 (step ST207). Step ST208). In this way, by limiting the enlargement / reduction ratio of the image, it is possible to solve the problem that the amount of parallax becomes larger than the limit and the 3D video data is displayed in a state where stereoscopic viewing cannot be performed. it can.

[0064] In addition to the parallax information, video data whose size (in millimeters) when video data is actually displayed on the screen may be reproduced in the control information. Also in this case, by observing the specified display size, the parallax amount does not increase beyond the limit, and the problem of displaying 3D video data in a state where stereoscopic viewing is impossible is solved. Can be.

[0065] Further, a means for notifying the user that the enlargement / reduction ratio is restricted is provided separately, and the user is informed that the enlargement / reduction ratio is restricted, and the enlargement / reduction ratio is displayed together. By

The user can display video data at a desired enlargement / z reduction ratio with reference to this display, so that the convenience can be improved.

Although the embodiments of the present invention have been described above, the stereoscopic video playback device of the present invention is not limited to the above-described embodiments, but may be implemented in various forms within the scope of the present invention. Of course, changes can be made.

Industrial potential

The stereoscopic video playback device according to the present invention can know the reference display size and the reference resolution, and can display video data with a desired amount of parallax. It can be widely applied to devices that can select the resolution.

Claims

The scope of the claims

[1] A stereoscopic video playback device that plays back a 3D video based on control information for controlling the display of 3D video data,

The control is performed to determine whether or not the amount of parallax on the display screen when the 3D image data is displayed is larger than the amount of parallax on the display screen when the 3D image data is displayed on a reference display device. Determining means for determining based on the information;

Image processing means for performing image processing for changing the amount of parallax; and performing image processing by the image processing means when the determining means determines that the amount of parallax becomes large. Video playback device.

2. The image processing device according to claim 1, wherein the image processing unit includes a parallax amount adjustment unit that adjusts the amount of parallax by moving a video of a predetermined viewpoint forming the three-dimensional video data in a horizontal direction. The stereoscopic video reproduction device as described in the above.

[3] The stereoscopic video playback device according to claim 1, wherein the image processing unit includes a size changing unit configured to change an image size of the three-dimensional video data.

4. The stereoscopic video playback device according to claim 1, wherein the control information includes information on a resolution of the display device serving as the reference.

[5] The control information according to any one of claims 1 to 3, wherein the control information includes information on a display size when the 3D video data is displayed on the reference display device. 3. The stereoscopic video playback device according to claim 1.

[6] A stereoscopic video playback device that plays back a 3D video based on control information for controlling the display of the 3D video data,

Judging means for judging whether or not the amount of parallax on the display screen when displaying the three-dimensional video data is a value that allows stereoscopic viewing according to the control information;

Size changing means for changing an image size of the three-dimensional video data, wherein when the determination means determines that the value is not stereoscopically viewable, the enlargement and reduction ratios are limited. Video playback device.

7. The stereoscopic video reproduction device according to claim 6, wherein the control information includes a parallax amount of an important subject and includes parallax information indicating a parallax amount of the three-dimensional video data.

[8] A stereoscopic video reproduction method for reproducing a 3D video based on control information for controlling display of the 3D video data,

The control is performed to determine whether or not the amount of parallax on the display screen when the 3D image data is displayed is larger than the amount of parallax on the display screen when the 3D image data is displayed on a reference display device. A determining step of determining based on the information;

Image processing step of performing image processing for changing the amount of parallax,

A stereoscopic video reproduction method, characterized in that when the parallax amount is determined to be large in the determining step, image processing is performed by the image processing step.

9. The stereoscopic video reproduction method according to claim 8, wherein the image processing step adjusts a parallax amount by moving an image of a predetermined viewpoint constituting the three-dimensional video data in a horizontal direction.

10. The stereoscopic video reproduction method according to claim 8, wherein the image processing step changes an image size of the three-dimensional video data.

11. The stereoscopic video playback method according to claim 8, wherein the control information includes information on a resolution of the reference display device.

12. The control device according to claim 8, wherein the control information includes a display size when the three-dimensional video data is displayed on the reference display device. 3D video playback method.

[13] A stereoscopic video reproducing method for reproducing a 3D video based on control information for controlling display of the 3D video data,

A determining step of determining whether or not the amount of parallax on the display screen when displaying the three-dimensional video data is a value capable of stereoscopic viewing according to the control information;

A size changing step of changing an image size of the three-dimensional video data, wherein when the determination step determines that the value is not a stereoscopically visible value, the enlargement and reduction ratio is limited. Video playback method.

14. The stereoscopic video reproduction method according to claim 13, wherein the control information includes a parallax amount of an important subject and parallax information indicating a parallax amount of the three-dimensional video data.